Hidden Hollow, NY
Lead detected, under the action levels
Latest 90th-percentile lead: 4.55 ppb (monitoring period 2022-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Hidden Hollow at a glance
Hidden Hollow serves about 32 people through 18 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Ontario County, New York. EPA system ID: NY3420254; phone on file: 315-856-0483. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2021 (3.6 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Hidden Hollow is 4.55 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 4.55 ppb |
| 2021 | 3.6 ppb |
| 2018 | 2.65 ppb |
Against other New York systems
Of the 2,077 New York systems with a lead result, the median latest reading is 1.5 ppb; 17 are over 15 ppb right now and 165 have gone over at some point. Hidden Hollow's 4.55 ppb sits at the 84th percentile in New York and the 89th nationally (higher means more lead).
Other water systems in Ontario County
34 other systems share Ontario County; 4 of them have a higher latest lead result than Hidden Hollow. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Geneva City | 13,334 | 3 ppb |
| Canandaigua-Farmington Consolidated W.D. | 13,000 | 1.3 ppb |
| Canandaigua City | 11,264 | 1.2 ppb |
| Mcwa - Geneva | 8,532 | 4 ppb |
| Canandaigua Town Cons. Wd | 6,800 | 1.3 ppb |
| Hopewell Cons Wd 1 | 3,781 | 1.3 ppb |
| Gorham Town Wd | 3,420 | 2.8 ppb |
| Geneva Wd #2 Csa | 2,680 | 2.1 ppb |
| Seneca Town Wd | 2,625 | 2.1 ppb |
| Victor Village | 2,443 | 5800 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Newark, NY may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Hidden Hollow whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.